Sacha Baron Cohen says no more Who is America? Sacha Baron Cohen took to Twitter to announce that his half-hour series Who is America? has ended for good, with the final episode airing last night on Showtime. Make sure to check out the tweet below, which also contains a video compilation of the criticism directed towards the show, and let us know what you think. Famous for creating a roster of iconic moments and incendiary characters, Baron Cohen returned to series television for the first time in more than a decade, writing and directing Who is America? In the series, Cohen appeared as all-new characters including Billy Wayne Ruddick Jr., PhD, Dr.